Multiuser detection in fast-fading multipath environments
نویسندگان
چکیده
منابع مشابه
Multiuser detection in fast-fading multipath environments
We propose a new framework for multiuser detection in fast-fading channels that are encountered in many mobile communication scenarios. Existing multiuser RAKE receivers, developed to combat multipath fading and multiuser interference in slow fading, suffer substantial degradation in performance under fast fading due to errors in channel state estimation. The detectors proposed in this paper em...
متن کاملEM-Based Multiuser Detection in Fast Fading Multipath Environments
We address the problem of multiuser detection in fast fading multipath environments for DS-CDMA systems. In fast fading scenarios, temporal variations of the channel cause significant performance degradation even with the RAKE receiver. We use a previously introduced Time-Frequency (TF) RAKE receiver based on a canonical formulation of the channel and signals to simultaneously combat fading and...
متن کاملMMSE multiuser detection in multipath fading channels
In this work, we propose an MMSE multiuser detector for asynchronous DS/CDMA systems operating over frequency-selective fading channels. It is shown that computation of a conditional MMSE estimate of the bit to be decoded may be carried out with a computational burden linear in the processing gain N . We also give a closed-form formula for the Error Probability and the Nearfar Resistance of the...
متن کاملMultiuser Detection in CDMA Fast Fading Multipath Channel using Heuristic Genetic Algorithm
this paper, a simple heuristic genetic algorithm is used for Multistage Multiuser detection in fast fading environments. Multipath channels, multiple access interference (MAI) and near far effect cause the performance of the conventional detector to degrade. Heuristic Genetic algorithms, a rapidly growing area of artificial intelligence, uses evolutionary programming for initial search, which n...
متن کاملMultistage multiuser detector for multipath fading channel
In this paper, the multistage multiuser detector for communication over multipath fading channel is considered. The detector consists of a matched filters bank and a linear equalizer whose outputs are diversity combined to produce initial data estimates. Using these data estimates multiuser interference is reconstructed and removed from the output signals of a the matched filters bank. Afterwar...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Journal on Selected Areas in Communications
سال: 1998
ISSN: 0733-8716
DOI: 10.1109/49.737638